The V_OH(min)rating of a TTL gate is lower than the V_IH(min)rating of a CMOS gate. Which of the following is commonly used to overcome this problem? A) Adding a fixed voltage divider bias resistive network at the output of the TTL device B) Adding an external pull- up resistor to V_cc C) Adding an external pull- down resistor to ground D) Avoiding this condition and only using TTL to drive TTL

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Quizplus · Accepted Answer

Adding an external pull-up resistor to Vcc is a common method to ensure that the output voltage of a TTL gate can reliably be interpreted as a high level by a CMOS input, thus overcoming the voltage level compatibility issue between TTL and CMOS devices.

The VOH(min) rating of a TTL Gate Is Lower Than

The V_OH(min)rating of a TTL Gate Is Lower Than